The record is soft, it should be close to 2 seconds faster. David needs to hit the 800 in 1:48 and hang on for a 29x 200m...David can do it. Every attempt at the record people came through the 800 too slow because it is down right scary running an 800 practically all out and having to run another 200m. As with any record, first of all you have to be capable, secondly you have to have the confidence to truly go after it.
I think he has the ability.
To paraphrase my coach, most people run the 1000 like a short 1500, when they should be running it like a long 800!